Method map

packages/core/src/entity/Collection.ts:798–808

* Maps the collection items based on your provided mapper function.

(mapper: (item: T, index: number) => R)

   * Maps the collection items based on your provided mapper function.
   */
  map<R>(mapper: (item: T, index: number) => R): R[] {
    this.checkInitialized();
    const items: R[] = [];
    let index = 0;

    for (const item of this.#items) {
      items.push(mapper(item, index++));
    }

    return items;
  }

  /**
   * Maps the collection items based on your provided mapper function to a single object.